Main types of functional ceramics

1. Piezoelectric ceramics: the so-called piezoelectric effect refers to the deformation of some media under the action of force, which causes the surface of the medium to be charged. This is the positive piezoelectric effect. On the contrary, when the electric field is applied, the medium will produce mechanical deformation, which is called inverse piezoelectric effect. This wonderful effect has been applied by scientists in many fields that are closely related to people’s lives to realize energy conversion, sensing, driving, frequency control and other functions. Its properties can be used for the following purposes: piezoelectric igniter, mobile X-ray power supply, shell detonating device. Electronic lighters are made of piezoelectric ceramics flint, the number of times of ignition can be more than 1 million times. Piezoelectric ceramics can be used to convert electrical energy into ultrasonic vibration, which can be used to explore the position and shape of underwater fish schools, conduct non-destructive flaw detection on metals, as well as ultrasonic cleaning and ultrasonic medical treatment, and can also be made into various ultrasonic cutters, welding devices and soldering irons, and process plastics and even metals. In addition, it can also be used to manufacture ultrasonic transducers, underwater acoustic transducers, electro-acoustic transducers, ceramic filters, ceramic transformers, ceramic frequency discriminators, high-voltage generators, infrared detectors, acoustic surface wave devices, electro-optical devices, ignition and detonation devices and piezoelectric gyro, etc.
Superconducting ceramics (2) : in 1987, American scientists have discovered ybco superconducting performance on 98 k ceramic, opened up a road for the practical application of superconducting materials, superconducting research history important milestone in human.
3. Capacitor ceramics: capacitor ceramics can store a large amount of electric energy. At present, there are tens of billions of ceramic capacitors produced in the world every year to complete the memory function in the computer.
4. Thermally sensitive ceramics: they can sense slight humidity changes and are used for temperature measurement and temperature control.
5. Gas-sensitive ceramics: the gas-sensitive elements can monitor, control, alarm and regulate the flammable, explosive, toxic and harmful gases.
6. Photosensitive ceramics: resistors made can be used as photoelectric control for automatic feeding, automatic exposure, and automatic counting.
7. Magnetic ceramics: they are part of important information recording materials and can also be made into permanent magnets for wind power generation and other fields.
8. There are also a number of other purposes such as semiconductor ceramic, insulating ceramics, dielectric ceramics, luminescent ceramics, sensitive ceramic, absorbing ceramics, laser ceramics, pottery, nuclear fuel propellant as ceramic, the solar energy light conversion ceramics, storage battery, damping ceramics, pottery and porcelain, ceramic solid biological technology, catalytic ceramic, special feature film, etc., in automatic control, instruments and meters, electronics, communications, energy, transportation, metallurgy, chemical industry, precision machinery, aerospace, defense and other departments shall play an important role.

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